Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$146M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$108M |
| 3 |
Apple
AAPL
|
+$62.9M |
| 4 |
Tesla
TSLA
|
+$51.9M |
| 5 |
Micron Technology
MU
|
+$39.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$108M |
| 2 |
Meta Platforms (Facebook)
META
|
+$104M |
| 3 |
Advanced Micro Devices
AMD
|
+$92.1M |
| 4 |
Amazon
AMZN
|
+$90.3M |
| 5 |
TSMC
TSM
|
+$82.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.19% |
| 5 | Healthcare | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
8101
CALL
NexPoint Residential Trust
NXRT
$488M
| $5.58K | ﹤0.01% |
200
| – | – |
2025 Q3
3 quarters
|
|
8102
PUT
Orchid Island Capital
ORC
$967M
| $5.58K | ﹤0.01% |
800
-100
| -11% | -$689 |
2018 Q2
32 quarters
|
|
8103
CALL
Compugen
CGEN
$186M
| $5.56K | ﹤0.01% |
2,600
-30,200
| -92% | -$75.7K |
2023 Q4
10 quarters
|
|
8104
CALL
Bank of Marin Bancorp
BMRC
$443M
| $5.54K | ﹤0.01% |
200
| – | – |
2026 Q1
1 quarter
|
|
8105
VanEck Digital India ETF
DGIN
$11.3M
| $5.53K | ﹤0.01% |
157
+103
| +191% | +$3.49K |
2026 Q1
1 quarter
|
|
8106
PUT
Federated Hermes
FHI
$4.31B
| $5.52K | ﹤0.01% |
100
| – | – |
2026 Q1
1 quarter
|
|
8107
PUT
Nano Dimension
NNDM
$581M
| $5.51K | ﹤0.01% |
3,800
+2,800
| +280% | +$4.57K |
2020 Q4
22 quarters
|
|
8108
Standard Lithium
SLI
$370M
| $5.5K | ﹤0.01% |
+2,000
| New | +$7.28K |
2026 Q2
0 quarters
|
|
8109
Deluxe
DLX
$1.09B
| $5.49K | ﹤0.01% |
+230
| New | +$5.99K |
2026 Q2
0 quarters
|
|
8110
PUT
BKV Corp
BKV
$2.27B
| $5.47K | ﹤0.01% |
+200
| New | +$5.5K |
2026 Q2
0 quarters
|
|
8111
CALL
Fathom Holdings
FTHM
$6.35M
| $5.45K | ﹤0.01% |
5,400
+3,300
| +157% | +$2.58K |
2025 Q3
3 quarters
|
|
8112
Invesco S&P 500 Equal Weight Consumer Discretionary ETF
RSPD
$392M
| $5.43K | ﹤0.01% |
97
+75
| +341% | +$4.12K |
2026 Q1
1 quarter
|
|
8113
CALL
Stevanato
STVN
$5.33B
| $5.42K | ﹤0.01% |
300
-400
| -57% | -$6.76K |
2026 Q1
1 quarter
|
|
8114
PUT
Luxfer Holdings
LXFR
$465M
| $5.41K | ﹤0.01% |
+300
| New | +$4.68K |
2026 Q2
0 quarters
|
|
8115
PUT
Cooper-Standard Automotive
CPS
$362M
| $5.41K | ﹤0.01% |
200
-17,800
| -99% | -$524K |
2021 Q4
18 quarters
|
|
8116
Oil States International
OIS
$485M
| $5.4K | ﹤0.01% |
674
-232
| -26% | -$2.2K |
2025 Q3
3 quarters
|
|
8117
PUT
Douglas Dynamics
PLOW
$922M
| $5.4K | ﹤0.01% |
+100
| New | +$4.61K |
2026 Q2
0 quarters
|
|
8118
PUT
HUTCHMED
HCM
$2.48B
| $5.38K | ﹤0.01% |
500
-1,400
| -74% | -$17.7K |
2024 Q4
6 quarters
|
|
8119
PUT
First Trust Asia Pacific ex-Japan AlphaDEX Fund
FPA
$109M
| $5.38K | ﹤0.01% |
100
-100
| -50% | -$5.17K |
2026 Q1
1 quarter
|
|
8120
PUT
GH Research
GHRS
$1.27B
| $5.38K | ﹤0.01% |
200
+100
| +100% | +$2.09K |
2025 Q3
3 quarters
|
|
8121
CALL
Fennec Pharmaceuticals
FENC
$362M
| $5.38K | ﹤0.01% |
500
+400
| +400% | +$3.26K |
2025 Q2
4 quarters
|
|
8122
CALL
Edgewell Personal Care
EPC
$1.33B
| $5.37K | ﹤0.01% |
+200
| New | +$4.27K |
2026 Q2
0 quarters
|
|
8123
PUT
PowerFleet Inc
AIOT
$352M
| $5.36K | ﹤0.01% |
1,400
-33,000
| -96% | -$116K |
2026 Q1
1 quarter
|
|
8124
Sypris Solutions
SYPR
$39.8M
| $5.36K | ﹤0.01% |
+2,206
| New | +$6.84K |
2026 Q2
0 quarters
|
|
8125
PUT
Kyverna Therapeutics
KYTX
$354M
| $5.35K | ﹤0.01% |
600
-20,300
| -97% | -$180K |
2025 Q4
2 quarters
|
|
Similar funds
Simplex Trading's Q2 2026 Portfolio in Review
As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
- Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
- Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
- Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
- Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.